MAX1385 Datasheet, PDF (50/52 Pages) Maxim Integrated Products – Dual RF LDMOS Bias Controllers with I2C/SPI Interface

Dual RF LDMOS Bias Controllers
with I²C/SPI Interface
Typical Operating Circuit (I²C Mode)
5V
SCL
SDA
MICROCONTROLLER
5V
5V
DV_DD GATEVDD AVDD REFDAC REFADC
SCL
SDA/DIN
ALARM
BUSY
SAFE2
SAFE1
+5V
A0/CSB
A1/DOUT
A2/N.C.
OPSAFE1
OPSAFE2
(AT LDMOSFET)
CNVST
DXP1
MAX1385
MAX1386
CS1+
CS1-
GATE1
DGND
SEL
ADCIN1
ADCIN2
CS2+
DXN1
(AT LDMOSFET)
DXP2
CS2-
EXTERNAL
REFERENCE
C_F*
R_F*
RF INPUT
C_F*
R_F*
DRAIN
SUPPLY
RF
OUTPUT
DRAIN
SUPPLY
DXN2
PGAOUT1 PGAOUT2
GATE2
AGND GATEGND
*SELECT R_F AND C_F BASED ON DESIRED FILTER CUT-OFF FREQUENCY.
LIMIT R_F TO MINIMIZE OFFSET ERRORS.
RF INPUT
RF
OUTPUT
50 ______________________________________________________________________________________